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8-Bit Shift Register 8-Bit Output Register, TTL Inputs

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The 74HCT595 is an high speed CMOS device that is designed to be pin compatable with 74LS low power Schottky types. An eight bit shift register accpets data from the serial input (DS) on each positive transition of the shift register clock (STCP). When asserted low the reset function ( ) sets all shift register values to zero and is indepent of all clocks. Data from the input serial shift register is placed in the output register with a rising pulse on the storages resister clock (SHCP). With the output enable asserted low the 3-state outputs Q0-Q7 become active and present th All registers capture data on rising edge and change output on the falling edge. If both clocks are connected together the input shift register is always one clock cycle ahead of the output register.


  • General Purpose Logic
  • Serial to Parallel Data conversion
  • Capture and hold data for extended periods of time.
  • Allow simple serial bit streams from a microcontroller to control as many peripheral lines as needed.
  • Wide array of products such as:
  • Computer peripherals
  • Appliances
  • Industrial control
  • Product Specifications

    Product Parameters

    Number of Gates -
    Family HCT
    VCC Min (V) 4.5 V
    VCC Maximum Rating 5.5 V
    tpd max @ (1.5V) - ns
    tpd max @ 1.8V (ns) - ns
    tpd max @ 2.5V (ns) - ns
    tpd max @ 3.3V (ns) - ns
    tpd max @ 5.0V (ns) 50 ns
    Input/ Output Current 4
    Description TTL Inputs, 8-Bit Output Register, 8-Bit Shift Register
    Output Type Push-Pull

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    Orderable Part Number Buy from Distributor / Contact Sales Request Samples


    Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
    Digi-Key Electronics 26120 10/4/2022 Europe, Asia, North America Buy Now
    RS Components - Spain 150 10/4/2022 Spain Contact Sales
    RS Components - Spain 2425 10/4/2022 Spain Contact Sales
    RS Components - UK 150 10/4/2022 England Buy Now
    RS Components - UK 2425 10/4/2022 England Buy Now
    Rutronik GmbH 2500 10/4/2022 Germany Buy Now
    Request Sample


    Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
    Arrow Electronics 2300 10/4/2022 United States Buy Now
    Digi-Key Electronics 26697 10/4/2022 Europe, Asia, North America Buy Now
    Future Electronics - Asia 12500 10/3/2022 Singapore Contact Sales
    Request Sample

    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site